diff --git a/publish-root.gradle b/publish-root.gradle
index 7cbd261..2c5fae8 100644
--- a/publish-root.gradle
+++ b/publish-root.gradle
@@ -6,6 +6,7 @@ ext["signing.key"] = ''
 ext["ossrhUsername"] = ''
 ext["ossrhPassword"] = ''
 ext["sonatypeStagingProfileId"] = ''
+ext["snapshot"] = 'true'
 
 File secretPropsFile = project.rootProject.file('local.properties')
 if (secretPropsFile.exists()) {
diff --git a/publishing.gradle b/publishing.gradle
index c49009d..02ec1f5 100644
--- a/publishing.gradle
+++ b/publishing.gradle
@@ -79,12 +79,17 @@ afterEvaluate {
     }
 }
 signing {
-    useInMemoryPgpKeys(
-            rootProject.ext["signing.keyId"],
-            rootProject.ext["signing.key"],
-            rootProject.ext["signing.password"],
-    )
-    sign publishing.publications
+    if (rootProject.ext["signing.keyId"] && rootProject.ext["signing.key"] && rootProject.ext["signing.password"]) {
+        useInMemoryPgpKeys(
+                rootProject.ext["signing.keyId"],
+                rootProject.ext["signing.key"],
+                rootProject.ext["signing.password"],
+        )
+        sign publishing.publications
+
+    } else {
+        sign configurations.archives
+    }
 }
 java {
     sourceCompatibility = JavaVersion.VERSION_1_8